Brake-shoe.



C. N. WINTER.

BRAKE SHOE.

APPLICATION FILED JULY 9. 1917. Y

1,288,867., PatntedSept. 4,1917.

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CHARLES 1\T. WINTER, OF VIRGINIA, ASSIGNOR TO THE AMERICAN BRAKE SHOE AND FOUNDRY COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

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. BRAKE-SHOE.

Patented Sept. 4, 1'91 Z Application filed July 9, 1917. Serial No. 179,345.

To all whom it may concern:

Be it known that 1, CHARLES N. WINTE a citizen of the United States, and a resident of Roanoke, in the county of Roanoke and State of Virginia, have made and invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

My invention relates to brake shoes, and particularly to thattype in which a reinforcing back is used to brace and strengthen the cast metal body of the shoe.

l/Vhen a brake shoe is applied to a rapidly moving wheel, enormous end thrusts are brought to bear upon the end stops of the shoe, these forces having in some lnstances caused the failure of the end stops. In order to strengthen and reinforce the end stops, it has heretofore been the practice, in certain types of shoes, to upwardly turn the ends of the reinforcing back and cast the end stops therearound. Due, however, to the relatively small amount of cast metal involved in the formation of an end stop, the molten metal, as it flowed around the up turned end of the reinforcing back, would become cooled and an imperfect casting would result, so that the liability of failure of the end stop was not overcome.

It is therefore an object of my invention to so design the reinforcing back, shoe body and end stops, that the latter are reinforced and braced by upturned portions of the back, which upturned portions, however, are not embedded in the end stops, as such would interfere with the proper casting thereof; but are so positioned that the end stops abut and are formed thereagainst. As thus constructed, a sound casting is obtained, and the end stops are braced and strengthened and able to withstand the end thrusts of the brake head.

With the foregoing and other objects in view, which will appear as the description proceeds, my invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed.

Referring to the drawings, wherein the preferred embodiment of my invention is disclosed:

Figure 1 is a view in side elevation of a brake shoe embodying the characteristic features of my invention, portions of the shoe being represented in section;

Fig. 2 is a top plan view thereof;

Fig. 3 is a fragmental view in perspective of one extremity of the reinforcing back;

Fig. l is a fragmental view in perspective of a brake shoe for car whee-ls embodying the characteristic features of my invention;

Fig. 5 is a top plan View of a portion of a brake shoe of the locomotive driver type, which is provided. with the attaching lug at one extremity of the shoe.

Referring specifically to the several views,

the reinforcing'back 10, preferably formed of ductile metal, such as mild steel, has the extreme ends thereof upwardly turned as at 11. Adjacent the upturned ends 11 of'the back, are the transversely elongated open ings 12 through which the cast metal of the body of the shoe extends to form the end stops 13. The cast metal body 14 of the shoe is anchored to the back, and may be provided with inserts of varying compositions, should it be so desired. The cast metal of the body during the formation of the shoe flows freely up through the openings 12 in the reinforcing back and forms the end stops 13. These cast metal end stops are formed entirely in front of, although they rest against,the upturned ends 11 of the back and extend to a height equal to the height of the latter. The end stops are accordingly braced and reinforced against the end thrusts of the brake head, which are always in a direction from the center toward the ends of the shoe. Further, the molten metal as it flows upwardly through the openings in the reinforcing back is not cooled to any extent by the upturned ends of the back, and a sound casting results.

The several figures of the drawings dis close my invention incorporated in diiferent types of shoes, Figs. 1 and :2 representing a flange driver shoe with a center at taching lug 15, while the shoe disclosed in Fig. 4: is of the flange car type. In this latter shoe, the end stops 17 also include the brake head guide lugs 18.

In Fig. 5 I have disclosed a brake shoe of the locomotive driver type embodying my invention, wherein the attaching lug is 10- cated at the end of the'shoe and is formed as an attaching hook 19, the legs of which 1. A brake shoe consisting of a cast metal 1 body, a reinforcing back anchored thereto having upturned ends located at the extreme ends of the body of the shoe, and end stops formed of the cast metal of the body of the shoe lying Wholly in front of and abutting against said upturned ends.

2. A brake shoe consisting of a cast metal body, a reinforcing back anchored thereto and provided with upturned ends at the ends of the body of the shoe, said reinforcing back provided With openings adjacent said upturned ends, the cast metal of the body of the shoe extending through said openings, abutting against said upturned ends and forming end stops.

3. A brake shoeconsisting of a cast metal body, a reinforcing back therefor having upturned ends located at the extreme ends of the cast body ,ofthe shoe, said reinforcing back provided With transversely elongated openings adjacent said upturned ends, and end stops abutting against and projecting in irontof said upturned ends, said end stops formed of the cast metal of the body of the shoe projecting through said openings.

Signed at Roanoke, in the. county of Roanoke and State of Virginia this 27th day of June A. D. 1917.

CHARLES N. WINTER.

WVit-nesses:

HARRY 1B. WEAVER,

WILSON B. MCPHERSGN.

Copies of this patent may be obtained for five cents each, by addressing 'the'commissioner -of intents;

Washingtom-DJO." 

